Improvement in spark-arresters



W. JACKSON;

SPARK-ARRESTER.

Patented Feb. 8, 18 76.

a a m J WITNESSES ATTORNEYS N.FETERS, FHUTO-LITHOGRAPIEFL WASHINGTON. D.C

:urrnn STATES PATENT. OFF CE;

'WILl'JIAM JACKSON, OF ALTOONA, PENNSYLVANIA.

IMPROVEMENT IN SPARK-ARRESTERS.

Specification forming part of Letters Patent N 0. 173,298, datedFebruary 8,1876; application filed December 18, 1875.

To all whom "it may concern:

Be it known that I, WILLIAM JACKSON, of Altoona, in the county of Blairand State of Pennsylvania, have invented a new and valuable Improvementin Spark-Arresters and I do hereby declare that the following is a full,clear, and exact description of the construction and operation of thesame, reference being had to the annexed drawings making a part of thisspecification, and to the letters and figures of referencemarkedthereon.

The figure of the drawings is a longitudinal vertical sectional view ofmy spark-arrester.

This invention has relation to improvements in spark-arresters forlocomotive-boilers; and it consists in the arrangement and novelconstruction of the various devices used, whereby. the sparks thrown upthe stack by the draft and blast will be effectually prevented fromgetting out of the stack, as will be hereinafter more fully explained.

In the annexed drawings, the letter A desig nates a locomotive-boiler,of which A is the smoke-box, and B the stack. The cylindrical portion ofthe stack extends considerably above the lower edge of the invertedconical enlargement O on the upper end of the stack,

whereby ahopper, D, is formed for the reception of the sparks. Thishopper is provided with an inclined bottom, J, which will conduct thesparks to an outlet-pipe, D, extending downward to the crown-sheetstraddling the boiler, and emptying into a box, E, provided with asliding door, a, operated by the stoker in the cab through the mediumofconnecting rods and levers c c. The upper portion of enlargement G ispartially closed by an annular flange, F, a central opening being formedtherein for the reception of an open inverted funnel, G, which formspart of a cylindrical reticulated or slotted exhaust-pipe, H, centrallyarranged in the stack, and extending from the reduced end of funnel G tothe bottom of the smoke-box.

When the products of combustion are discharged into the smoke box," thatportion thereof consisting of smoke and gases will be carried throughthe meshes or openings '5 in pipe H into the open air, whiletheincandescent sparks will be-carried'up the passages d, between pipe Hand stack B into hopper D, formed as above described, when the inclinedbottom J- will conduct them to outlet pipe D, whence they will bedischarged into box E. Upon reaching a suitable or appointed spot,

- the contents of this box will be discharged by opening sliding door a.

What 1 claim as new, and desire to secure by Letters Patent, is

The smoke-stack B, provided with the hopperD, having inclined perforatedbottom J, centrally-perforated cover F, and dischargepipe D, incombination with the slotted tube H, having funnel-shaped mouth Gr,substantially as described, and for the purpose set forth.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

WILLIAM JACKSON.

Witnesses:

MILES R. J ONES,

CHARLES M. WELsHoNs.

